• 한국정밀공학회지
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• 제24권3호
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• pp.100-107
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• 2007

A internal lobe pump is suitable for oil hydraulics of machine tools, automotive engines, compressors, constructions and other various applications. In particular, the pump is an essential machine element of an automotive engine to feed lubricant oil. The subject of this paper is the theoretical analysis of internal lobe pump whose the main components are the rotors: usually the outer one is characterized by lobes with circular shape, while the inner rotor profile is determined as conjugate to the other. The topic of this paper is the design of a new rotor, which is based on specific performance as different types depending on the shape of the lobe of the outer rotor. First, the design of internal lobe pumps with circular, elliptical, and their combined lobe profiles is considered. The latter is a new type of lobe profile with special shape whose curvature follows a definite function. Then we introduce the performance indexes used for the comparison. Some of these indexes, such as flow rate and flow rate irregularity, are commonly used for the comparison, while specific slipping is particularly suitable in this case. It is possible to notice that the circular and elliptical type is comparable to the circular one or the elliptical one in terms of flow rate irregularity, but has improved performance in terms of specific slipping. Results obtained from the analysis enable the designer and manufacturer of oil pump to be more efficient in this field.

• Journal of Acupuncture Research
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• 제33권2호
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• pp.109-116
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• 2016

Objectives : Our primary objective lies in understanding the current landscape of translational research on acupuncture, moxibustion and pharmacopuncture. Methods : We searched our own selection of keywords of acupuncture, moxibustion and pharmacopuncture and translational research from three overseas databases (Pubmed, Scopus, Medicine) and four domestic databases (DBpia, KISS, Riss4u, Korea Med). Results : We have chosen 41 articles in total-40 articles on acupunture, 6 article on moxibustion(5 articles were duplicated in use in each category). Origin-wise, 48.8 %/24.8 %/17.0 % of our articles pool came from USA/China/Korea, respectively. UK, Austria, Thailand and Italy contributed the rest of our article pool. For those articles written in USA and China, review articles were the most common type. For the US articles, all 10 review articles were non-systematic reviews, while, for China's contribution, one out of 4 review articles were systematic review. Type-wise, our research pool's breakdown is as follows ; 17 review articles, 11 experimental research, 2 randomized controlled trials(RCT), 1 clinical trial, 4 conference reports, 1 letter, 1 study protocol and 4 uncategorized. Topic-wise, brain-neurology was most frequently referred with 8 articles, followed by parkinson's disease (3 articles) and epilepsy (2 articles). Conclusion : 1. In terms of research submission articles, Korea appears to be lacking translational research on acupuncture, moxibustion and pharmacopuncture, compared to USA and China, in our view. 2. Unlike the cases of USA and China, most of Korean translational research is limited to doing a T1 level of translational research. In order to bring bench-to-bedside to light. we believe, there should be more studies, and thereby a certain level of activation, to the T2 level of translational research in Korea. 3. Further, in our view there should be more efforts to improve article quality at the T1 level of translational research, which eventually becomes the fundamentals of the next level of research (i.e. T2 research), as well as to increase the number of research submissions, going forward.

• 디지털융복합연구
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• 제10권6호
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• pp.141-152
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• 2012

본 연구는 컨버전스 유형별 비즈니스모델 개발을 위한 혁신도구 비교 연구이다. 먼저 문헌고찰을 통하여 컨버전스 유형, 비즈니스 모델, 혁신도구에 대한 기존연구를 학습하고. 이를 근거로 컨버전스 환경 하에서 혁신적 비즈니스모델을 개발하기 위해 혁신도구를 이용한 비즈니스모델 개발 개념인 컨버전스-비즈니스-혁신도구 큐브(CBI Cube) 모형을 개발하였다. 이 개념의 구체화를 위해 전문가집단을 대상으로 한 델파이(DelPhi)기법과 AHP기법을 적용하여 CBI Cube 모형의 구성인자를 도출하고 비즈니스모델 개발을 위한 혁신도구의 상대적 우선순위를 비교하였다. 본 연구를 통해 기존 비즈니스모델의 벤치마킹이나 단순 모방의 수준을 넘어 가치혁신형 비즈니스 모델의 개발이 가능하게 되어 혁신 제품 서비스의 개발 및 혁신 시장개발에 보다 쉽게 접근할 수 있게 될 것을 기대한다.

• Clinical and Experimental Reproductive Medicine
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• 제43권1호
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• pp.26-30
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• 2016

Objective: We aimed to investigate the prevalence of erectile dysfunction (ED) and the usage of phosphodiesterase type 5 (PDE5) inhibitors for ED treatment in infertile couples. Methods: A total of 260 male partners in couples reporting infertility lasting at least 1 year were included in this study. In addition to an evaluation of infertility, all participants completed the International Index of Erectile Function (IIEF)-5 questionnaire to evaluate their sexual function. The participants were asked about their use of PDE5 inhibitors while trying to conceive during their partner's ovulatory period and about their concerns regarding the risks of PDE5 inhibitor use to any eventual pregnancy and/or the fetus. Results: Based on the IIEF-5 questionnaire, 41.5% of the participants (108/260) were classified as having mild ED (an IIEF-5 score of 17-21), while 10.4% of the participants (27/260) had greater than mild ED (an IIEF-5 score of 16 or less). The majority (74.2%, 193/260) of male partners of infertile couples had a negative perception of the safety of using a PDE5 inhibitor while trying to conceive. Only 11.1% of men (15/135) with ED in infertile couples had used a PDE5 inhibitor when attempting conception. Conclusion: ED was found to be common in the male partners of infertile couples, but the use of PDE5 inhibitors among these men was found to be very low. The majority of male partners were concerned about the risks of using PDE5 inhibitors when attempting to conceive. Appropriate counseling about this topic and treatment when necessary would likely be beneficial to infertile couples in which the male partner has ED.

• 한국임상보건과학회지
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• 제5권2호
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• pp.864-880
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• 2017

Purpose. The purpose of this study was to investigate the trends of the stress intervention program for domestic nurses. Methods. This study was conducted by analyzing 28 papers, which were selected from three hundred seventeen dissertation theses on Domestic Dissertations and Major Associated Journals on Nursing Stress Intervention by searching the Academic Research Information Service(http://riss4u.net) from 1995 to February 2017. Results. 1. The theses were analyzed by academic field, year, research subject, research program type, research topic, analysis of intervention study method and result variables. 2. The study showed that 15(82.14%) theses are masters', 8(28.57) theses are doctors' and 5(17) are journals. By nurses position, 26(92.86%) theses were about general nurses. By hospital, 21(75.00%) theses were about nurses working at the general hopitals whose wards were more than 300. 3. For research type, 7 theses were about aromatherapy(25.00). For the research subjects, 16 theses were about psychological variables. The study showed that the subjects were $22.62{\pm}7.62$ persons and mean intervention period was $3.8{\pm}2.61$ weeks. For experimental methods, 19 cases (67.86%) were non-equalty control group, which are most. Conclusions. In conclusion, research on nurses stress mediation has been steadily increasing. However, the studies on nurses stress intervention need to be diversified and activated because the intervention methods and types are fragmentary and the research fileds are concentrated on theses.

• 대한약침학회지
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• 제17권4호
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• pp.15-21
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• 2014

Objectives: The purpose of this study was to investigate the current trends in research on pharmacopuncture in Korea since 2007. Methods: A literature review was performed by using the search engines 'Science and Technology Society Village', 'Korean Studies Information Service System', 'National Discovery for Science Leaders', and 'Oriental Medicine Advanced Searching Integrated System' in Korea from January 2007 to December 2013. Searched key words were 'pharmacopuncture', 'herbal acupuncture', 'aqua-acupuncture', and 'bee venom'. Finally, we selected 457 papers, including Korean experimental studies and clinical studies. Selected papers were classified according to year of publication, type of pharmacopuncture, disease & topic, research type and the publishing journal. Results: One hundred fifty pharmacopunctures were studied in 457 papers. Single compound pharmacopuncture was the most studied pharmacopuncture in experimental studies while animal-based pharmacopuncture was the most studied pharmacopuncture in clinical studies. Bee venom placed first among the various pharmacopunctures, followed by placenta, sweet bee venom, mountain-ginseng, and anti-inflammatory pharmacopunctures. Experimental research on pharmacopuncture has fallen since 2007 when 55 papers were published. However, clinical research has been increasing steadily. In clinical studies, case reports were numerous than randomized clinical trials (RCTs). Musculoskeletal diseases were the most frequently-treated diseases in studies on pharmacopuncture; among the musculoskeletal diseases, rheumatoid arthritis was the most frequently-treated disease in experimental studies and low back pain was the most frequently-treated condition in clinical studies. Since 2007, 45 different journals have published studies on pharmacopuncture, with the Journal of the Korean Acupuncture and Moxibustion Medicine Society having the largest number of papers on pharmacopuncture and the Journal of Pharmacopuncture the second largest number. Conclusion: The trends in research on pharmacopuncture published in studies from 2007 to 2013 were similar to those in studies published before 2006. Many studies on pharmacopuncture focused on bee venom and musculoskeletal diseases. Additional studies on diverse types of and indications for pharmacopuncture are needed.

• 한국초등과학교육학회지:초등과학교육
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• 제26권4호
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• pp.359-371
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• 2007

The purpose of this study was to investigate elementary school students' conceptions of gas and analyse the type of alternative conceptions of gas which students constructed. To appreciate the conceptions formed by elementary school students on this topic, 173 sixth grade students from an elementary school located in Suwon participated in this study. Additionally, their conceptions and their alternative conceptions of gas represented by the questionnaires were analyzed. The questionnaires consisted of 11 questions related to the conception of gas. To analyze the types of alternative conceptions which presented themselves, constructed prototypes were generated by interviewing the students themselves. From our results, we suggest that sixth grade elementary school students have various conceptions of gas and tend to think that gas is weighty, and that gaseous volume decreases by pressure. However, their conceptions of gas melting in water were very low, as only about 16% of students were aware of this scientific conception. Students who did not understand precisely the conception of the nature of oxygen, carbon dioxide and hydrogen were over 20%. The results of the interviews showed that the construction of alternative conceptions of gas was affected by various and complex causes.

• 한국문헌정보학회지
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• 제44권1호
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• pp.101-115
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• 2010

멀티미디어 검색은 전통적인 검색과 웹 검색을 차별화시키는 중요한 요소 중 하나이다. 본 연구에서는 국내 주요 검색 포털인 네이버 이용자들의 멀티미디어 검색 행태를 분석, 평가하였다. 이를 위하여 이용자들이 입력한 통합 검색 질의들로 구성된 질의 로그와 질의에 대한 검색 결과에서 이용자들이 조회한 문서를 기록한 클릭 로그를 분석하였다. 연구 결과, 이용자가 입력하는 멀티미디어 질의 중 음악 질의가 차지하는 비중이 가장 높았으며, 이미지 질의와 동영상 질의의 비중은 비슷한 것으로 나타났다. 한편 멀티미디어 관련 컬렉션들 중 이용자가 가장 많이 조회하는 컬렉션은 동영상 컬렉션이었고, 이어서 이미지 컬렉션, 음악 컬렉션 순으로 나타났다. 이용자가 입력하는 멀티미디어 질의나 멀티미디어 컬렉션에서 클릭하는 문서 모두 엔터테인먼트와 관련된 주제가 가장 많았다. 본 연구의 결과는 향후 포털의 멀티미디어 컨텐츠 구축 및 검색 알고리즘 개발에 활용될 수 있을 것으로 기대된다.

• Toxicological Research
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• 제24권1호
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• pp.1-9
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• 2008

Ptdlns(4,5)$P_2$ is a key cellular phosphoinositide that localizes in separate and distinctive pools in subcellular membrane and vesicular compartments. In membranes, Ptdlns(4,5)$P_2$ acts as a precursor to second messengers and is itself a main signaling and targeting molecule. Specific subcellular localization of type I PIP kinases directed by interacting with specific targeting module differentiates Ptdlns(4,5)$P_2$ production in a spatial and temporal manner. Several lines of evidences support the idea that Ptdlns(4,5)$P_2$ is generated in very specific pools in a spatial and temporal manner or by feeding Ptdlns(4,5)$P_2$ directly to effectors. In this concept, the interaction of PIPKI isoforms with a specific targeting module to allow precise subcellular targeting modulates highly specific Ptdlns(4,5)$P_2$ synthesis and channeling overall effectors. For instance, localization of PIPKI${\gamma}$661 to focal adhesions by an interaction with talin results in spatial and temporal production of Ptdlns(4,5)$P_2$, which regulates EGF-stimulated directional cell migration. In addition, Type $I{\gamma}$ PIPK is targeted to E-cadherin in cell adherence junction and plays a role in controlling dynamics of cell adherence junction and endocytosis of E-cadherin. Characterizing how PIP kinase isoforms are regulated by interactions with their targeting modules, as well as the mechanisms by which their product, Ptdlns(4,5)$P_2$, exerts its effects on cellular signaling processes, is crucial to understand the harmonized control of numerous cellular signaling pathways. Thus, in this review the roles of the Ptdlns(4)P(5) kinases and Ptdlns(4,5)$P_2$ were described and critically reviewed in terms of regulation of the E-cadherin trafficking, cell migration, and formation of cell adherence junction which is indispensable and is tightly controlled in epithelial-to-mesenchymal transition process.

• 한국의상디자인학회지
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• 제18권3호
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• pp.71-83
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• 2016

This study attempted to analyze trends of structural changes in the front middle part of men's underwear and get basic data for the development of men's underwear patterns. In terms of a research method, the structure and pattern of the front middle part of men's underwear were analyzed by referring to the design and description of the drawing, focusing on men's underwear which targeted to isolate penis from scrotum among the 'men's underwear' or 'functional men's underwear'-related patents. According to the study, three topics were obtained as follows: a support attached to the inside of the front middle part; inner cloth attached to the inside of the front middle part; change in the structure of the front middle panel. The aspects by the specific topic targeted to isolate penis from scrotum and prevent the scrotum from adhered to a thigh are as follows: 1) When a support is attached to the inside of the front middle part, the following three methods are proposed: Penis isolated from scrotum by a rest which is designed using the band; penis and scrotum rested in the band and in a pocket respectively; protruded rest inside the front middle part of the underwear. 2) When an inner cloth is attached to the inside of the front middle part, the following methods are designed: A pocket-type inner cloth is attached; isolation of penis hole from the scrotum pocket using a rectangular separator; U-shaped pocket designed to rest penis and scrotum is attached. 3) Regarding change in the structure of the front middle panel, the integration of penis and scrotum resting parts can be divided into two cases: Securing a space using wrinkles; keeping it voluminous using the vertical line. In this all-in-one penis and scrotum-holding type, in addition, different front panel patterns were applied.